Martin Tewari, the president of the trucking division at USA Truck Inc., resigned from his job on March 13, according to a company filing with the Securities and Exchange Commission.

The company didn’t provide any additional details other than to state that a search is underway for his replacement. Tewari joined USA Truck in September 2015 after a nearly a decade at the former Con-way Truckload Inc.

Tewari is the latest to leave during a tumultuous 12 months at the Van Buren, Arkansas, truckload carrier, which ranks No. 53 on the Transport Topics Top 100 list of the largest U.S. and Canadian for-hire carriers.

In May 2016, Chief Financial Officer Michael Borrows stepped down, leaving the job vacant for five months. James Reed replaced Burrows in October, but only a few months later he was promoted to CEO when Randy Rogers abruptly resigned a week before fourth-quarter earnings were released.

USA Truck lost $7.7 million dollars in 2016 after earning $17 million in profits combined in 2014 and 2015, although it’s only posted annual profits three times since 2008. Since 2009 the company has lost 38.5 million dollars.